/* FCE Ultra - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  Copyright (C) 2002 Xodnizel
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * VRC-1
 *
 */

#include "mapinc.h"


#define map75sel mapbyte1[0]
#define map75ar  mapbyte2

DECLFW(Mapper75_write) {
	switch (A & 0xF000) {
	case 0x8000: ROM_BANK8(0x8000, V); break;
	case 0x9000:
		VROM_BANK4(0x0000, map75ar[0] | ((V & 2) << 3));
		VROM_BANK4(0x1000, map75ar[1] | ((V & 4) << 2));
		map75sel = V; MIRROR_SET(V & 1); break;
	case 0xa000: ROM_BANK8(0xa000, V); break;
	case 0xc000: ROM_BANK8(0xc000, V); break;
	case 0xe000: V &= 0xF; map75ar[0] = V; V |= (map75sel & 2) << 3; VROM_BANK4(0x0000, V); break;
	case 0xf000: V &= 0xF; map75ar[1] = V; V |= (map75sel & 4) << 2; VROM_BANK4(0x1000, V); break;
	}
}

void Mapper75_init(void) {
	SetWriteHandler(0x8000, 0xffff, Mapper75_write);
}

